Remove QScreen::orientationUpdateMask

It simplifies the API and reduces surprise to have rotation working by default.
On Android, the manifest specifies which orientations the application has
been designed to support; on iOS, it is controlled via the
UISupportedInterfaceOrientations property list key.
In addition, QWindow::contentOrientation() is another way to give
a hint to the window manager, or on iOS to directly control whether
the window's rotation is locked or not.

Task-number: QTBUG-35427
Task-number: QTBUG-38576
Task-number: QTBUG-44569
Task-number: QTBUG-51012
Task-number: QTBUG-83055
Change-Id: Ieed818497f686399db23813269af322bfdd237af
Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@qt.io>

9 files changed, 11 insertions, 111 deletions

diff --git a/src/gui/kernel/qguiapplication.cpp b/src/gui/kernel/qguiapplication.cpp
index 356f9fb11a..8fe06c87e5 100644
--- a/src/gui/kernel/qguiapplication.cpp
+++ b/src/gui/kernel/qguiapplication.cpp
@@ -3073,25 +3073,6 @@ void QGuiApplicationPrivate::processScreenOrientationChange(QWindowSystemInterfa
     QScreen *s = e->screen.data();
     s->d_func()->orientation = e->orientation;
 
-    updateFilteredScreenOrientation(s);
-}
-
-void QGuiApplicationPrivate::updateFilteredScreenOrientation(QScreen *s)
-{
-    Qt::ScreenOrientation o = s->d_func()->orientation;
-    if (o == Qt::PrimaryOrientation)
-        o = s->primaryOrientation();
-    o = Qt::ScreenOrientation(o & s->orientationUpdateMask());
-    if (o == Qt::PrimaryOrientation)
-        return;
-    if (o == s->d_func()->filteredOrientation)
-        return;
-    s->d_func()->filteredOrientation = o;
-    reportScreenOrientationChange(s);
-}
-
-void QGuiApplicationPrivate::reportScreenOrientationChange(QScreen *s)
-{
     emit s->orientationChanged(s->orientation());
 
     QScreenOrientationChangeEvent event(s, s->orientation());
@@ -3126,9 +3107,6 @@ void QGuiApplicationPrivate::processScreenGeometryChange(QWindowSystemInterfaceP
 
         if (s->primaryOrientation() != primaryOrientation)
             emit s->primaryOrientationChanged(s->primaryOrientation());
-
-        if (s->d_func()->orientation == Qt::PrimaryOrientation)
-            updateFilteredScreenOrientation(s);
     }
 
     s->d_func()->emitGeometryChangeSignals(geometryChanged, availableGeometryChanged);
diff --git a/src/gui/kernel/qguiapplication_p.h b/src/gui/kernel/qguiapplication_p.h
index 8ce8f2b2d6..2511f992c7 100644
--- a/src/gui/kernel/qguiapplication_p.h
+++ b/src/gui/kernel/qguiapplication_p.h
@@ -153,7 +153,6 @@ public:
     static void processApplicationTermination(QWindowSystemInterfacePrivate::WindowSystemEvent *e);
 
     static void updateFilteredScreenOrientation(QScreen *screen);
-    static void reportScreenOrientationChange(QScreen *screen);
     static void processScreenOrientationChange(QWindowSystemInterfacePrivate::ScreenOrientationEvent *e);
     static void processScreenGeometryChange(QWindowSystemInterfacePrivate::ScreenGeometryEvent *e);
     static void processScreenLogicalDotsPerInchChange(QWindowSystemInterfacePrivate::ScreenLogicalDotsPerInchEvent *e);
diff --git a/src/gui/kernel/qplatformscreen.cpp b/src/gui/kernel/qplatformscreen.cpp
index 7c1e2158b1..25d2be4b51 100644
--- a/src/gui/kernel/qplatformscreen.cpp
+++ b/src/gui/kernel/qplatformscreen.cpp
@@ -282,29 +282,6 @@ Qt::ScreenOrientation QPlatformScreen::orientation() const
     return Qt::PrimaryOrientation;
 }
 
-/*
-    Reimplement this function in subclass to filter out unneeded screen
-    orientation updates.
-
-    The orientations will anyway be filtered before QScreen::orientationChanged()
-    is emitted, but the mask can be used by the platform plugin for example to
-    prevent having to have an accelerometer sensor running all the time, or to
-    improve the reported values. As an example of the latter, in case of only
-    Landscape | InvertedLandscape being set in the mask, on a platform that gets
-    its orientation readings from an accelerometer sensor embedded in a handheld
-    device, the platform can report transitions between the two even when the
-    device is held in an orientation that's closer to portrait.
-
-    By default, the orientation update mask is empty, so unless this function
-    has been called with a non-empty mask the platform does not need to report
-    any orientation updates through
-    QWindowSystemInterface::handleScreenOrientationChange().
-*/
-void QPlatformScreen::setOrientationUpdateMask(Qt::ScreenOrientations mask)
-{
-    Q_UNUSED(mask);
-}
-
 QPlatformScreen * QPlatformScreen::platformScreenForWindow(const QWindow *window)
 {
     // QTBUG 32681: It can happen during the transition between screens
diff --git a/src/gui/kernel/qplatformscreen.h b/src/gui/kernel/qplatformscreen.h
index 0be7646032..acad5c246b 100644
--- a/src/gui/kernel/qplatformscreen.h
+++ b/src/gui/kernel/qplatformscreen.h
@@ -125,7 +125,6 @@ public:
 
     virtual Qt::ScreenOrientation nativeOrientation() const;
     virtual Qt::ScreenOrientation orientation() const;
-    virtual void setOrientationUpdateMask(Qt::ScreenOrientations mask);
 
     virtual QWindow *topLevelAt(const QPoint &point) const;
     QWindowList windows() const;
diff --git a/src/gui/kernel/qscreen.cpp b/src/gui/kernel/qscreen.cpp
index df628fcc73..3fd1548d04 100644
--- a/src/gui/kernel/qscreen.cpp
+++ b/src/gui/kernel/qscreen.cpp
@@ -113,11 +113,6 @@ void QScreenPrivate::setPlatformScreen(QPlatformScreen *screen)
         refreshRate = 60.0;
 
     updatePrimaryOrientation();
-
-    filteredOrientation = orientation;
-    if (filteredOrientation == Qt::PrimaryOrientation)
-        filteredOrientation = primaryOrientation;
-
     updateHighDpi();
 }
 
@@ -511,57 +506,24 @@ QRect QScreen::availableVirtualGeometry() const
 }
 
 /*!
-    Sets the orientations that the application is interested in receiving
-    updates for in conjunction with this screen.
-
-    For example, to receive orientation() updates and thus have
-    orientationChanged() signals being emitted for LandscapeOrientation and
-    InvertedLandscapeOrientation, call setOrientationUpdateMask() with
-    \a{mask} set to Qt::LandscapeOrientation | Qt::InvertedLandscapeOrientation.
-
-    The default, 0, means no orientationChanged() signals are fired.
-*/
-void QScreen::setOrientationUpdateMask(Qt::ScreenOrientations mask)
-{
-    Q_D(QScreen);
-    d->orientationUpdateMask = mask;
-    d->platformScreen->setOrientationUpdateMask(mask);
-    QGuiApplicationPrivate::updateFilteredScreenOrientation(this);
-}
-
-/*!
-    Returns the currently set orientation update mask.
-
-    \sa setOrientationUpdateMask()
-*/
-Qt::ScreenOrientations QScreen::orientationUpdateMask() const
-{
-    Q_D(const QScreen);
-    return d->orientationUpdateMask;
-}
-
-/*!
     \property QScreen::orientation
     \brief the screen orientation
 
-    The screen orientation represents the physical orientation
-    of the display. For example, the screen orientation of a mobile device
-    will change based on how it is being held. A change to the orientation
-    might or might not trigger a change to the primary orientation of the screen.
+    The \c orientation property tells the orientation of the screen from the
+    window system perspective.
 
-    Changes to this property will be filtered by orientationUpdateMask(),
-    so in order to receive orientation updates the application must first
-    call setOrientationUpdateMask() with a mask of the orientations it wants
-    to receive.
+    Most mobile devices and tablet computers contain accelerometer sensors.
+    The Qt Sensors module provides the ability to read this sensor directly.
+    However, the windowing system may rotate the entire screen automatically
+    based on how it is being held; in that case, this \c orientation property
+    will change.
 
-    Qt::PrimaryOrientation is never returned.
-
-    \sa primaryOrientation()
+    \sa primaryOrientation(), QWindow::contentOrientation(), QOrientationSensor
 */
 Qt::ScreenOrientation QScreen::orientation() const
 {
     Q_D(const QScreen);
-    return d->filteredOrientation;
+    return d->orientation;
 }
 
 /*!
diff --git a/src/gui/kernel/qscreen.h b/src/gui/kernel/qscreen.h
index 09e1d4259a..039940f196 100644
--- a/src/gui/kernel/qscreen.h
+++ b/src/gui/kernel/qscreen.h
@@ -137,9 +137,6 @@ public:
     Qt::ScreenOrientation orientation() const;
     Qt::ScreenOrientation nativeOrientation() const;
 
-    Qt::ScreenOrientations orientationUpdateMask() const;
-    void setOrientationUpdateMask(Qt::ScreenOrientations mask);
-
     int angleBetween(Qt::ScreenOrientation a, Qt::ScreenOrientation b) const;
     QTransform transformBetween(Qt::ScreenOrientation a, Qt::ScreenOrientation b, const QRect &target) const;
     QRect mapBetween(Qt::ScreenOrientation a, Qt::ScreenOrientation b, const QRect &rect) const;
diff --git a/src/gui/kernel/qscreen_p.h b/src/gui/kernel/qscreen_p.h
index 7da542c25e..7543202c2f 100644
--- a/src/gui/kernel/qscreen_p.h
+++ b/src/gui/kernel/qscreen_p.h
@@ -77,9 +77,7 @@ public:
 
     QPlatformScreen *platformScreen = nullptr;
 
-    Qt::ScreenOrientations orientationUpdateMask;
     Qt::ScreenOrientation orientation = Qt::PrimaryOrientation;
-    Qt::ScreenOrientation filteredOrientation = Qt::PrimaryOrientation;
     Qt::ScreenOrientation primaryOrientation = Qt::LandscapeOrientation;
     QRect geometry;
     QRect availableGeometry;
diff --git a/src/plugins/platforms/ios/qiosscreen.h b/src/plugins/platforms/ios/qiosscreen.h
index d5a253461d..4f494815a9 100644
--- a/src/plugins/platforms/ios/qiosscreen.h
+++ b/src/plugins/platforms/ios/qiosscreen.h
@@ -73,7 +73,6 @@ public:
 
     Qt::ScreenOrientation nativeOrientation() const override;
     Qt::ScreenOrientation orientation() const override;
-    void setOrientationUpdateMask(Qt::ScreenOrientations mask) override;
 
     QPixmap grabWindow(WId window, int x, int y, int width, int height) const override;
 
diff --git a/src/plugins/platforms/ios/qiosscreen.mm b/src/plugins/platforms/ios/qiosscreen.mm
index 4dbb0a4cdf..406470ef8e 100644
--- a/src/plugins/platforms/ios/qiosscreen.mm
+++ b/src/plugins/platforms/ios/qiosscreen.mm
@@ -300,6 +300,8 @@ QIOSScreen::QIOSScreen(UIScreen *screen)
         }
     }
 
+    m_orientationListener = [[QIOSOrientationListener alloc] initWithQIOSScreen:this];
+
     updateProperties();
 
     m_displayLink = [m_uiScreen displayLinkWithBlock:^(CADisplayLink *) { deliverUpdateRequests(); }];
@@ -520,17 +522,6 @@ Qt::ScreenOrientation QIOSScreen::orientation() const
 #endif
 }
 
-void QIOSScreen::setOrientationUpdateMask(Qt::ScreenOrientations mask)
-{
-    if (m_orientationListener && mask == Qt::PrimaryOrientation) {
-        [m_orientationListener release];
-        m_orientationListener = 0;
-    } else if (!m_orientationListener) {
-        m_orientationListener = [[QIOSOrientationListener alloc] initWithQIOSScreen:this];
-        updateProperties();
-    }
-}
-
 QPixmap QIOSScreen::grabWindow(WId window, int x, int y, int width, int height) const
 {
     if (window && ![reinterpret_cast<id>(window) isKindOfClass:[UIView class]])